﻿//-----------------------------------------------------------------------
// <copyright file="XmlResult.cs" company="OOHM PROCESSAMENTO DE DADOS LTDA.">
//     Microsoft Public License (MS-PL) This license governs use of the accompanying
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//-----------------------------------------------------------------------
namespace AbstractSaaSTemplate.Application.Mvc{    using System;
    using System.Linq;
    using System.Runtime.Serialization;
    using System.Text;
    using System.Web;
    using System.Web.Mvc;
    using System.Xml;
    using System.Xml.Linq;
    using System.Xml.Serialization;

    /// <summary>
    /// Encapsulates the result of an action method and is used to perform a framework-level
    /// operation on behalf of the action method which will represent the model as a XML string.
    /// </summary>
    public class XmlResult : ActionResult
    {
        /// <summary>
        /// Initializes a new instance of the XmlResult class.
        /// </summary>
        public XmlResult()
        {
        }

        /// <summary>
        /// Initializes a new instance of the XmlResult class with
        /// the data model which will be serialized into a Xml string.
        /// </summary>
        /// <param name="data">The data which will be serialized.</param>
        public XmlResult(object data)
        {
            this.Data = data;
        }

        /// <summary>
        /// Gets or sets the content type of the response.
        /// </summary>
        public string ContentType { get; set; }

        /// <summary>
        /// Gets or sets the content encoding of the response
        /// </summary>
        public Encoding ContentEncoding { get; set; }

        /// <summary>
        /// Gets or sets the data.
        /// </summary>
        public object Data { get; set; }

        /// <summary>
        /// Processes the result serializing the model into an Xml representation
        /// which will be retrieved to the response.
        /// </summary>
        /// <param name="context">The context in which the result is executed. The context information includes the controller, HTTP content, request context, and route data.</param>
        public override void ExecuteResult(ControllerContext context)
        {
            if (context == null)
            {
                throw new ArgumentNullException("context");
            }

            HttpResponseBase response = context.HttpContext.Response;
            if (!string.IsNullOrWhiteSpace(this.ContentType))
            {
                response.ContentType = this.ContentType;
            }
            else
            {
                response.ContentType = "text/xml";
            }

            if (this.ContentEncoding != null)
            {
                response.ContentEncoding = this.ContentEncoding;
            }

            if (this.Data != null)
            {
                if (this.Data is XmlNode)
                {
                    response.Write(((XmlNode)this.Data).OuterXml);
                }
                else if (this.Data is XNode)
                {
                    response.Write(((XNode)this.Data).ToString());
                }
                else
                {
                    var dataType = this.Data.GetType();
                    if (dataType.GetCustomAttributes(typeof(DataContractAttribute), true).FirstOrDefault() != null)
                    {
                        var serializer = new DataContractSerializer(dataType);
                        serializer.WriteObject(response.OutputStream, this.Data);
                    }
                    else
                    {
                        var serializer = new XmlSerializer(dataType);
                        serializer.Serialize(response.OutputStream, this.Data);
                    }
                }
            }
        }
    }
}

